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TLC7528I Datasheet(PDF) 8 Page - Texas Instruments |
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TLC7528I Datasheet(HTML) 8 Page - Texas Instruments |
8 / 28 page TLC7528C, TLC7528E, TLC7528I DUAL 8BIT MULTIPLYING DIGITALTOANALOG CONVERTERS SLAS062E − JANUARY 1987 − REVISED NOVEMBER 2008 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION + − R11 5 k Ω A2 VOA DACB R6 20 k Ω (see Note B) VOB AGND A1 DGND A4 R3 (see Note A) R1 (see Note A) AGND C1 (see Note C) C2 (see Note C) R2 (see Note A) R4 (see Note A) AGND OUTB RFBB AGND OUTA 5 VDD 17 7 14 DACA/ DACB DB0 DB7 8 8 8 8 REFB RFBA DACA CS WR 16 15 6 A3 R10 20 k Ω (see Note B) Latch Input Buffer Control Logic Latch R8 20 k Ω R7 10 k Ω (see Note B) R9 10 k Ω (see Note B) R11 5 k Ω R5 20 k Ω VI(A) ±10 V VI(B) ±10 V NOTES: A. R1, R2, R3, and R4 are used only if gain adjustment is required. See table in Figure 3 for recommended values. Adjust R1 for VOA = 0V with code 10000000 in DACA latch. Adjust R3 for VOB = 0V with 10000000 in DACB latch. B. Matching and tracking are essential for resistor pairs R6, R7, R9, and R10. C. C1 and C2 phase compensation capacitors (10pF to 15pF) may be required if A1 and A3 are high-speed amplifiers. Figure 4. Bipolar Operation (4-Quadrant Operation) Table 1. Unipolar Binary Code Table 2. Bipolar (Offset Binary) Code DAC LATCH CONTENTS ANALOG OUTPUT DAC LATCH CONTENTS ANALOG OUTPUT MSB LSB† ANALOG OUTPUT MSB LSB‡ ANALOG OUTPUT 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 −VI (255/256) −VI (129/256) −VI (128/256) = − Vi/2 −VI (127/256) −VI (1/256) −VI (0/256) = 0 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 VI (127/128) VI (1/128) 0V −VI (1/128) −VI (127/128) −VI (128/128) † 1LSB = (2−8)VI ‡ 1LSB = (2−7)VI |
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